选择合适的介词填空完成句子。

1. Let's send an email         _ (from, to) Mum.

2. Click         _ (in, on) "Send",please.

3. I've got a letter            (from, of) my brother.

4. Dad is         _ (to, at) work now.

5. We go to school            (in, from) Monday _        (to, at) Saturday.

6. The message will go            (in, to) Tom's computer.